770 °C (1,420 °F; 1,040 K) (decomposes, anhydrous) 86.5 °C (octadecahydrate)
Solubility in water
31.2 g/100 mL (0 °C) 36.4 g/100 mL (20 °C) 89.0 g/100 mL (100 °C)
Solubility
slightly soluble in alcohol, dilute mineral acids
Acidity (pKa)
3.3–3.6
Magnetic susceptibility (χ)
−93.0×10−6 cm3/mol
Refractive index (nD)
1.47[1]
Structure
Crystal structure
monoclinic (hydrate)
Thermochemistry
Std enthalpy of formation (ΔfH⦵298)
-3440 kJ/mol
Hazards
NFPA 704 (fire diamond)
1
0
0
NIOSH (US health exposure limits):
PEL (Permissible)
none[2]
REL (Recommended)
2 mg/m3[2]
IDLH (Immediate danger)
N.D.[2]
Related compounds
Other cations
Gallium sulfate Magnesium sulfate
Related compounds
See Alum
Supplementary data page
Aluminium sulfate (data page)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Nverify (what is YN ?)
Infobox references
Chemical compound
Aluminium sulfate is a salt with the formula Al2(SO4)3. It is soluble in water and is mainly used as a coagulating agent (promoting particle collision by neutralizing charge) in the purification of drinking water[3][4] and wastewater treatment plants, and also in paper manufacturing.
The anhydrous form occurs naturally as a rare mineral millosevichite, found for example in volcanic environments and on burning coal-mining waste dumps. Aluminium sulfate is rarely, if ever, encountered as the anhydrous salt. It forms a number of different hydrates, of which the hexadecahydrate Al2(SO4)3·16H2O and octadecahydrate Al2(SO4)3·18H2O are the most common. The heptadecahydrate, whose formula can be written as [Al(H2O)6]2(SO4)3·5H2O, occurs naturally as the mineral alunogen.
Aluminium sulfate is sometimes called alum or papermaker's alum in certain industries. However, the name "alum" is more commonly and properly used for any double sulfate salt with the generic formula XAl(SO 4) 2·12H 2O, where X is a monovalent cation such as potassium or ammonium.[5]
^Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
^ abcNIOSH Pocket Guide to Chemical Hazards. "#0024". National Institute for Occupational Safety and Health (NIOSH).
^Global Health and Education Foundation (2007). "Conventional Coagulation-Flocculation-Sedimentation". Safe Drinking Water is Essential. National Academy of Sciences. Archived from the original on 2007-10-07. Retrieved 2007-12-01.
^Kvech S, Edwards M (2002). "Solubility controls on aluminum in drinking water at relatively low and high pH". Water Research. 36 (17): 4356–4368. Bibcode:2002WatRe..36.4356K. doi:10.1016/S0043-1354(02)00137-9. PMID 12420940.
^Austin, George T. (1984). Shreve's Chemical process industries (5th ed.). New York: McGraw-Hill. p. 357. ISBN 9780070571471. Archived from the original on 2014-01-03.
Aluminiumsulfate is a salt with the formula Al2(SO4)3. It is soluble in water and is mainly used as a coagulating agent (promoting particle collision...
Potassium alum, potash alum, or potassium aluminiumsulfate is a chemical compound first found mentioned under various Sanskrit names in Ayurvedic medicinal...
Ammonium aluminiumsulfate, also known as ammonium alum or just alum (though there are many different substances also called "alum"), is a white crystalline...
(/ˈæləm/) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula XAl(SO 4) 2·12 H 2O, such that X is a...
reacting nitric acid with aluminium hydroxide. Aluminium nitrate may also be prepared a metathesis reaction between aluminiumsulfate and a nitrate salt with...
destabilizing and removing suspended materials than other aluminium salts such as aluminiumsulfate, aluminium chloride and various forms of polyaluminium chloride...
drying agent or absorbent. Several sulfates of aluminium have industrial and commercial application. Aluminiumsulfate (in its hydrate form) is produced...
Sodium aluminiumsulfate is the inorganic compound with the chemical formula NaAl(SO4)2·12H2O (sometimes written Na2SO4·Al2(SO4)3·24H2O). Also known as...
for the manufacture of other aluminium compounds: calcined aluminas, aluminiumsulfate, polyaluminium chloride, aluminium chloride, zeolites, sodium aluminate...
plating materials. The most common anodizing effluents, aluminium hydroxide and aluminiumsulfate, are recycled for the manufacturing of alum, baking powder...
bisulfate: NaCl + H2SO4 → NaHSO4 + HCl Aluminiumsulfate, also known as paper maker's alum, aluminiumsulfate is made by treating bauxite with sulfuric...
response to its presence. The reaction of aluminiumsulfate and sodium bicarbonate forms carbon dioxide and aluminium hydroxide which stabilises the formation...
color, such as green vitriol for hydrated iron(II) sulfate and blue vitriol for hydrated copper(II) sulfate. These materials were found originally as crystals...
NaCl + 26 H 2O The mordants aluminium triacetate and aluminium sulfacetate can be prepared from aluminiumsulfate, the product formed being determined...
Ettringite is a hydrous calcium aluminiumsulfate mineral with formula: Ca6Al2(SO4)3(OH)12·26H2O. It is a colorless to yellow mineral crystallizing in...
agents developed include sodium aluminiumsulfate (NaAl(SO4)2·12H2O), disodium pyrophosphate (Na2H2P2O7), and sodium aluminium phosphates (NaH14Al3(PO4)8·4H2O...
treatment. Aluminium hydroxide is prepared at the treatment plant from aluminiumsulfate by reacting it with sodium hydroxide or bicarbonate. Al2(SO4)3 + 6...
employed as a molluscicide: Metal salts such as iron(III) phosphate, aluminiumsulfate, and ferric sodium EDTA, relatively non-toxic, most are approved for...
a caustic pencil). This is a short stick of medication. Anhydrous aluminiumsulfate is the main ingredient and acts as a vasoconstrictor in order to disable...
sulfide); and the sulfate minerals, such as gypsum (calcium sulfate), alunite (potassium aluminiumsulfate), and barite (barium sulfate). On Earth, just...
Global Information
verify (what is 
?)
